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TLG-1 Certificate of Analysis

Certified Reference Material: Tungsten Ore

Printable version of the certificate

TLG-1, a sample of a low-grade scheelite ore from Browne's Lake mine, Beaverhead County, Montana, was donated by General Electric Company, Cleveland, Ohio. In decreasing order of abundance, minerals present are: quartz, calcite, hydrogarnet, amphibole, dolomite, chlorite, feldspar, mica, clay minerals, scheelite, hematite, magnetite, sphalerite, and chalcopyrite.

Recommended Value and 95% Confidence Interval
Material Tungsten wt %
TLG-1 0.083 ± 0.004

A certificate of analysis will be issued with each order of TLG-1. A copy of CANMET Report 76-5, "Tungsten ores CT-1, BH-1 and TLG-1: Their characterization and preparation for use as certified reference materials", will be forwarded, free of charge, on request to the Coordinator, CCRMP.

Approximate Chemical Composition
Constituent wt %
W 0.083
Si 21.5
Al 3.0
Fe (total) 8.6
Ca 16.6
Mg 2.7
Na 0.2
K 0.4
Ti 0.1
Mn 1.3
Mo <0.01
C (total) 1.4
H2O+ (950°C) 2.2
H2O- (105°C) 1.6

For further information

555 Booth Street
Ottawa, ON K1A 0G1

Telephone: 343-543-6830
E-mail: Contact CCRMP

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